[sdiy] Eurorack Power Protection

yo at vacoloco.net yo at vacoloco.net
Wed Jan 4 14:01:19 CET 2017


Why not use a resettable fuse?
They come in all shapes and current handling capability.


On 2017-01-04 12:19, Richie Burnett wrote:
> Neat!  I like how the MOSFET channel conducts to remove the otherwise
> excessive voltage-drop of the body-diode when the supply is connected
> the correct way around.  It's a bit like the synchronous rectifier in
> modern SMPSUs.  I think I've also seen that circuit used to allow PV
> panels to charge a battery efficiently, but then disconnect the panel
> to prevent the battery draining back into the panel when it's dark.
> 
> -Richie,
> 
> -----Original Message----- From: Roman Sowa
> Sent: Wednesday, January 04, 2017 10:38 AM
> To: synth-diy at synth-diy.org
> Subject: Re: [sdiy] Eurorack Power Protection
> 
> I've been using this P-MOSFET protection for about a decade now and it
> saved a lot of boards out there. People love to connect power 
> backwards,
> especially when there are ony 2 wires to connect. Must admit I'm also
> guilty of powering backwards the boards I designed myself, so you think
> I should know how to connect it, right? Well, shit happens.
> 
> It works great, no drop in voltage and good protection. But if you
> connect AC voltage it will burn. But only the P-MOSFET will burn and
> protect the circuit at its last duty. That happened a few times.
> 
> Roman
> 
> W dniu 2017-01-04 o 05:23, AlanP pisze:
>> On 4/01/2017 9:41 a.m., Jacob Watters wrote:
>>> Thank you for your feedback and suggestions.
>> 
>> Lazy bugger that I am, I haven't used these, but R.G. Keen has a 
>> couple
>> of suggestions for this problem in the guitar pedal world.
>> 
>> http://geofex.com/Article_Folders/mosswitch/mosswitch.htm
>> http://www.geofex.com/article_folders/cheapgoodprot.htm
>> 
>>> Sincerely,
>>> Jacob Watters
>> 
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